What Is White Powder On Leaves Of Crape Myrtle?

Filed Under: Trees, Diseases and Fungus, Techniques & Methods · Keywords: White, Powder, Leaves, Foliage, Crape, Myrtle · 4485 Views
My Crepe Myrtle trees along my driveway get a white powder on them every summer, what is this white powder and how do I get rid of it?

Thank You!

Tammy Fulbright
Conover, NC

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3 Answers

Answer #1 · Gardenality.com's Answer · Hi Tammy - This is a good question and an easy one for me to answer without seeing a picture. The white powdery substance on your crape myrtle is powdery mildew. Unfortunately, you must have one of the older varieties that is not powdery mildew resistant. You can spray the tree with Neem Oil to eliminate the powdery mildew however it might come back and require respraying.

It it were me, and I had a variety of crape myrtle that got powdery mildew every year, I would remove and replace it with a resistant variety. The powdery mildew is unsightly and it's a pain to spray trees, especially large ones. All of the Crape Myrtles on the market today that have Native American Indian names, such as Natchez, Muskogee, Tonto, Miami, Acoma, Catawba, etc. are all resistant to powdery mildew. These varieties are known as the Fauriei Hybrids. Most local nursery and garden centers carry these varieties.

Of course, I'm not suggesting you remove the tree, just saying that this is what I'd do. Let me know if you have any further questions.


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Maple Tree

Maple Tree · Gardenality Genius · Zone 10A · 30° to 35° F
I have an older crape myrtle variety that get powdery mildew every year. The tree is 22 years old, extremely healthy, and well taken care of. If it wasn't such a beautiful multi trunk specimen I would remove it tomorrow. Like Brent said, spraying it every year is not easily done on larger trees. The fact that it is next to my pond makes it even harder as any spraying needs to be kept from the waters surface. If you have no great attachment or love for the tree I would also replace it with a more resistant variety. Not only the foliage, but the blooms are always affected by the mildew also.

5 years ago ·
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Answer #2 · Gardenality.com's Answer · Hi Tammy,

If you decide to keep the Crape Myrtles you amy want to use a systemic Fungicide such as Fertilome Liquid Systemic Fungicide. . Systemic fungicide won't wash off. It will last much longer. This being said Neem Oil is organic and very safe to use. Neem also controls mites and insects. Crape Myrtles are very prone to get Honey Dew Aphids. Neem Oil will control both problems.

Hope this helps you.


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Answer #3 · Tammy Fulbright's Answer · Thank you both for your answers to my question! The trees are about 14 years old and just started developing the wite powder about 5 years ago. There are about 15 trees lining the upper part of my driveway, so it will be pretty costly to remove them. I'll look into both suggestions.



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